Before proceeding to the content of this article, learn how to activate your Google Maps API key on Google Cloud. 

After doing that, you can follow the steps below: 

1. Access the [App Center > For Your Website] menu;
2. Scroll down the page until you find [Google Maps];
3. Enter the API key in the [API Key] field;
4. In the same direction, you can still activate the connection by marking it as [Active];
5. Save the changes.